I have been experiencing intermittent errors when trying to get a list of contributors of various pages on Wikipedia.
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As an interesting fact about hardware failures : A few years later I know the ORACLE developed some intermittent errors that were very hard to track down.
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Such tools have value in load testing software ( by signing on to an application with hundreds or thousands of instances simultaneously ), or in checking for intermittent errors in software.
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The significantly lower impedance and higher capacitance of these cables distort the DMX512 digital waveforms, which in turn can cause irregular operation or intermittent errors that are difficult to identify and correct.
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Route flapping is caused by pathological conditions ( hardware errors, software errors, configuration errors, intermittent errors in communications links, unreliable connections, etc . ) within the network which cause certain reachability information to be repeatedly advertised and withdrawn.